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Acute exacerbations in chronic hepatitis C: a clinicopathological and prognostic study
Insights
Acute exacerbations are common in chronic hepatitis C patients, occurring annually in 11.9% of cases. These events are typically mild and do not impact long-term outcomes like cirrhosis development.
Area of Science:
- Hepatology
- Virology
- Gastroenterology
Background:
- Chronic hepatitis C (CHC) is a significant global health concern.
- Understanding acute exacerbations in CHC is crucial for patient management.
- This study investigates the characteristics and implications of acute exacerbations in CHC.
Purpose of the Study:
- To determine the incidence of acute exacerbations in chronic hepatitis C.
- To identify factors predisposing to acute exacerbations.
- To analyze the clinicopathological features and outcomes of acute exacerbations in CHC.
Main Methods:
- A cohort of 194 biopsy-verified, anti-HCV-positive patients were followed.
- Data collected included incidence of acute exacerbations, biochemical resolution, and cirrhosis development.
- Statistical analysis identified factors influencing exacerbation occurrence and outcomes.
Main Results:
- An 11.9% annual incidence of acute exacerbations was observed in 40.2% of patients.
- Most exacerbations were asymptomatic and histologically mild.
- Elevated baseline alanine aminotransferase (ALT) levels predicted higher exacerbation risk (OR=3.6).
- Acute exacerbations did not influence cirrhosis development or sustained biochemical resolution.
- Pre-existing chronic active hepatitis was a strong predictor of cirrhosis (OR=6.5).
Conclusions:
- Acute exacerbations are frequent in chronic hepatitis C.
- These events are generally clinically and histologically mild.
- Acute exacerbations do not appear to adversely affect long-term outcomes in CHC patients.
Background/Methods:
To examine the incidence, predisposing factors, clinicopathological characteristics and implications of acute exacerbations in chronic hepatitis C, a consecutive series of 194 biopsy-verified, anti-HCV-positive and hepatitis B surface antigen-negative patients were followed up and studied for the events of acute exacerbations, sustained biochemical resolution and development of cirrhosis.
Results:
During a mean period of 6.2 +/- 3.5 (1.0-14.0) years, 151 episodes of acute exacerbations were recorded in 78 patients (40.2%). The estimated annual incidence of acute exacerbations was 11.9%. Fifty-five percent of acute exacerbations were asymptomatic. Histological study of acute exacerbations showed mild to moderate lobular inflammatory activities without bridging hepatic necrosis in all and periportal piecemeal in 23 (42.6%). The clinicopathological features of acute exacerbations in patients with chronic hepatitis C were less severe than those in patients with chronic hepatitis B. The route of infection, sex, age, mode of clinical presentation and the initial histology did not influence the occurrence of acute exacerbations. Only those with alanine aminotransferase > or = 300 U/l at entry tended to develop acute exacerbations more frequently (p < 0.001, odds ratio = 3.6, 95% confidence interval: 1.9-6.5). Acute exacerbations per se did not influence the subsequent development of cirrhosis or sustained biochemical resolution. Cirrhosis developed more frequently in patients with chronic active hepatitis at entry (p < 0.001, odds ratio = 6.5, 95% confidence interval: 2.6-16.0). Compared with baseline HCV-RNA level, HCV-RNA increased in 61% of acute exacerbations but the genotype remained unchanged in 75%.
Conclusions:
These results suggest that acute exacerbations also occur frequently in patients with chronic hepatitis C. They are clinically indolent, histologically less severe and not likely to be followed by sustained remission or development of cirrhosis.